Re: angina question
We can not diagnose you but I do have some advice as someone who is going through anxiety (my father died of a heart attack and I instantly assumed I had a heart problem too).
Chest pain--literal pain (stabbing, squeezing, twitching etc,)--can be a symptom of anxiety. Angina USUALLY develops in older individuals and can only be diagnosed by a doctor. Get it checked out to feel some peace of mind.
Now the advice: STOP CHECKING FOR SYMPTOMS ONLINE!!! You will drive yourself nuts. If it is really uncomfortable--go to the hospital and get it checked out. When you are anxious about having something (and thus, subconsciously look to see if you have symptoms) you can cause said symptoms. I did this.
Hope this helps.